Definition:
A W-3 Form is a transmittal form which is sent to the Social Security Administration (SSA) showing total earnings, Social Security wages, Medicare wages and withholding for all employees for the previous year.
The W-3 is required to be sent to the SSA no later than the beginning of March, along with copies of all W-2 forms for all employees. The totals for each item on the W-3 must equal the totals for all of these items on all employee W-2 forms. The W-3 also includes total state wages and withholding for all employees.
